JPH11117350A - Working machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a working machine to prevent the occurrence of interference between a working link and a vessel in a working machine having a partial storage function for an excavated substance by providing a vessel and a conveying function. SOLUTION: A frame 3 is arranged on a running body 1. A dump type vessel 4 is mounted on the frame 3. A working link 6 is mounted on the frame 3 through a swirl device 5, and the work link 6 is working tool 23. A selection device consisting of a switch 43 is provided to selectively allow operation of only either the working link 6 and the vessel 4. Further, either the working link 6 or the vessel 4 prohibits operation of the other during operation of either of the working link 6 or the vessel 4. Further, a priority order is set, and one on the priority side is caused to operate in priority even during operation of the other side and the other is stopped.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a working machine which performs operations such as excavation, demolition, and crushing, and has a function of storing and transporting excavated and dismantled materials, equipment, and materials.

[0002]

2. Description of the Related Art When performing plumbing work or repair work on a road or the like, a hydraulic excavator for excavation, loading and transporting of excavated soil and backfill soil, and transport of construction materials such as sewer pipes. You need a dump truck to do it.

[0003] Further, when performing construction on a narrow road where a dump truck cannot enter, excavated soil, construction materials, and the like are temporarily collected in a predetermined place, and an operator uses a cat wheel or the like to perform the above-described operation. Carry out transportation work.

On the other hand, Japanese Utility Model Laid-Open Publication No. Sho 57-12463 discloses a transport vehicle equipped with an excavator, which can be dumped to a rear portion on a traveling section frame having wheels as shown in FIG. In this embodiment, a driver's seat 52 is installed on one side in front of the running frame, and a work link 54 having a backhoe bucket is installed on the other side via a turning device 55. This truck with excavator is
The excavated earth and sand can be collected and transported in the vessel 53.

[0005]

As described above, at least two vehicles, a hydraulic shovel and a dump truck, are required in the construction of roads and the like, and when construction is performed using a plurality of vehicles. Requires a large site area for construction, which hinders road traffic.

[0006] Further, in a construction in a narrow place, an operator for transportation is required, but this is a work that places a heavy burden on the operator, and the efficiency of the operation itself is reduced.

On the other hand, the driving vehicle with an excavator shown in FIG. 12 disclosed in Japanese Utility Model Laid-Open No. 57-12463 has a problem in workability and the like in that turning of only one side is allowed, but one vehicle is required. The above-mentioned problems can be solved to some extent because of the functions of excavation and transportation. However, during turning or bending operation of the working link 54, the vessel 5
3 or the work link 54 is operated during the operation of the vessel 53, which may interfere with each other between the vessel 53 and the work link 54, thereby impairing smooth operation. There is.

SUMMARY OF THE INVENTION In view of the above problems, an object of the present invention is to provide a working machine having a function of partially storing and transporting an excavated object or the like by a vessel, which can prevent interference between a working link and a vessel. It is in.

[0009]

According to the working machine of the present invention, a frame is installed on a traveling body, a dump vessel is mounted on the frame, and a work is performed on the frame via a turning device. A link is attached, a work implement is attached to the work link, and a selection device is provided which selectively allows only one of the work link and the vessel to operate (claim 1).

[0010] In the working machine of the present invention, a frame is set on a traveling body, a dump-type vessel is mounted on the frame, and an articulated working link is mounted on the frame via a turning device. A mounting device is provided for attaching a work implement to the work link and prohibiting operation of one of the work link and the vessel while the other is in operation (claim 2).

In the working machine of the present invention, a frame is set on a traveling body, a dump type vessel is mounted on the frame, and a working link is mounted on the frame via a turning device. Attach a work tool to the work link,
An apparatus for prioritizing the operation of one of the work link and the vessel and stopping the other is provided (claim 3).

[0012]

In the working machine according to the present invention, earth and sand and other loads are discharged by inclining the vessel. Also,
Since the work link has a multi-joint structure, excavation and other work specific to work tools are performed by bending and extending and turning movements of each joint, loading excavated earth and sand and other objects into the vessel, or from the vessel to the work place Supply of materials.

According to the first aspect of the present invention, there is provided a working machine having a selection device for permitting the operation of either the vessel or the work link. When the vessel is selected, only the operation of the vessel is permitted and the work link is selected. When
The turning and bending / extending operations of the work link are allowed.

In the working machine according to the second aspect, even if the work link is operated during the operation of the vessel, the operation of the work link is prohibited on condition that the vessel is in operation. Conversely, even if an attempt is made to operate the vessel while the work link is operating, the operation of the vessel is prohibited on condition that the work link is operating.

In the working machine according to the third aspect, for example, when the operation of the vessel is prioritized, the operation link does not operate even if the operating means of the operation link is operated during the operation of the vessel. If the operation means of the vessel is operated during the operation of the work link, the work link is stopped and the vessel is operated.
Conversely, when the work link is prioritized, the operation of the work link has priority.

[0016]

FIG. 1 is a side view showing an embodiment of a working machine according to the present invention in a state where a vessel is lifted, and FIGS. 2 and 3 are a plan view and a front view of the embodiment, respectively. The link is not shown).

In this embodiment, reference numeral 1 denotes a traveling body. In this embodiment, a crawler 1b type is shown, but a wheel type traveling body is also used. Reference numeral 2 denotes a turning device installed on the traveling body frame 1a, and as shown in FIG.
Has a hydraulic motor for turning 2a and a center joint 2b. Reference numeral 3 denotes a turning frame provided on the turning object side of the turning device 2. In some cases, a non-swirl frame may be installed instead of the swivel frame 3.

At the rear of the revolving frame 3, a vessel 4 capable of dumping is mounted, and at the front end, an articulated work link 6 is mounted via a revolving device 5, and the work link 6 and the vessel 4 are connected. A power unit 7 is mounted between them.

As shown in FIG. 1, the vessel 4 is mounted on the turning frame 3 via a lift device 8 and a dump device 9. The lift device 8 includes an X-shaped support frame 12 interposed between an underframe 11 fixed on the swing frame 3 and the lift frame 10, and a lift hydraulic pressure interposed between the swing frame 3 and the lift frame 10. And a cylinder 13. The X-shaped support frame 12 is provided on the left and right sides of the vessel 4, and one end of each of the two frames 14 and 15 is connected to the underframe 11 and the vessel 4 respectively.
And rollers 18 and 19 for rolling back and forth along the vessel 4 and the underframe 11, respectively, are attached to the other end. The dump device 9 includes two hydraulic cylinders 20 for dumping interposed between the lift frame 10 and the bottom of the vessel 4.

In the present embodiment, the vessel 4 is configured to be dumped rearward, but a configuration in which the vessel 4 is dumped sideways may be employed. Further, the lift device 8 may be omitted, and the vessel 4 may be mounted on the turning frame 3 via the dump device 9.

The work link 6 is installed at the center of the front end of the revolving frame 3. In this embodiment, the commonly used boom 21, the arm 22, the backhoe bucket 23, and the up and down, rotating An example including a boom cylinder 25, an arm cylinder 26, and a bucket cylinder 27 is shown.

FIG. 4 is a block diagram of a working machine for performing a remote control by wireless. FIG. 4 is a control block diagram of a working machine for performing a remote control by wireless. In FIG. 4, reference numeral 30 denotes a portable transmitter remotely controlled by an operator, and 31 denotes a receiver mounted on the turning frame 3 so as to receive a specific power wireless signal from the transmitter 30. The signal received by 31 is sent to the arithmetic unit 32 by digital transmission.

The arithmetic unit 32 extracts an operation signal from the received signal by arithmetic processing in the CPU 33, and in accordance with the content of the operation signal, respectively, the hydraulic cylinder for lifting 13, the hydraulic cylinder for dumping 20, and the turning device 5 for the working link 6. Motor 5a, boom cylinder 25, arm cylinder 26, bucket cylinder 27, etc.
Of the traveling motor (not shown) are provided.

Numerals 39a to 39f denote a hydraulic cylinder 13 for lifting, a hydraulic cylinder 20 for dumping, a turning motor 5a of a turning device 5 for a working link 6, and a boom cylinder 2 respectively.
5, a control valve for the arm cylinder 26 and the bucket cylinder 27, which is a hydraulically operated three-position switching valve that switches hydraulic oil from the main hydraulic power source 47 and supplies it to the actuators, It controls forward and reverse rotation and stop of the hydraulic motor.

Reference numerals 37a to 37f denote pilot valves of the control valves 39a to 39f, respectively.
By controlling the supply of a to 39f to each operation room,
The control valves 39a to 39f are respectively operated. Each of the pilot valves 37a to 37f is an electromagnetic on / off valve or an electromagnetic proportional pressure reducing valve.

Reference numerals 35a to 35f denote the operation command means 34a.
Signals from the pilot valves 37a to 37f
f to supply current to the solenoid of the pilot valve 37a-
37f is a valve driver for performing a switching operation.

Reference numeral 43 denotes an operation changeover switch for selectively operating the vessel operation system and the work link system.
Are relays that are energized and de-energized by opening and closing the operation changeover switch 43. Reference numerals 44a and 44b denote a-contacts and b-contacts of the relays. The switch 43 and the relay 44 constitute an operation system selection device. .

The a contact 44a of the relay 44 is connected to valve drivers 35a and 35b of the operating system of the hydraulic cylinder 13 for lifting and the hydraulic cylinder 20 for dumping, and the operation command means 3.
4a, 34b, the b contact 44b is connected to the swing motor 5a of the swing device 5 of the work link 6, the boom cylinder 25, the arm cylinder 26, and the bucket cylinder 2
7 is inserted between each of the valve drivers 35c to 35f and the operation command means 34c to 34f. These contacts 44
a and 44b may be inserted between the valve drivers 35a to 35f and the pilot valves 37a to 37f, and may be further inserted between the pilot valves 37a to 37f and the control valves 39a to 39f.
The pilot circuit may be turned on and off by inserting an electromagnetic valve into the pilot circuit of 39f and controlling the solenoid of the electromagnetic valve with the output of the relay 44.

As shown in FIG. 1 to FIG.
The receiver 31, pilot valve 37 (37
a to 37f), control valve 39
(Combination of 39a to 39f) and an operation changeover switch 43 are provided. Further, tanks 40 such as an oil tank and a fuel tank are mounted. The power unit 7 includes an engine / hydraulic pump 41 and a radiator / oil cooler 42.
And the tanks 40, which are covered by the cover 7a. The power unit 7 extends one end of the vessel, and the power unit 7 is extended by the extension 4a.
And the cover 7a is covered and protected.

In this embodiment, the operation changeover switch 4
When the relay 3 is closed and the relay 44 is excited, the contact 44a is closed and the contact 44b is opened, so that only the lifting hydraulic cylinder 13 and the dump hydraulic cylinder 20 of the vessel 4 can be operated, and the turning of the turning device 5 of the working link 6 can be performed. Motor 5
a, operation of the boom cylinder 25, the arm cylinder 26, and the bucket cylinder 27 becomes impossible.

On the other hand, when the operation changeover switch 43 is opened and the relay 44 is demagnetized, the contact 44b is closed and the contact 44a is opened, so that the lifting hydraulic cylinder 13 and the dump hydraulic cylinder 20 of the vessel 4 become inoperable. The turning motor 5a of the turning device 5 of the link 6, the boom cylinder 2
5. Operation of the arm cylinder 26 and the bucket cylinder 27 becomes possible.

As described above, by operating the operation changeover switch 43, only one of the Bessel actuator and the working link actuator can be operated. Even if operating means such as levers or switches are operated at the same time, the vessel 4 and the work link 6 are not operated at the same time, so that mutual interference due to simultaneous operation is prevented, and work can be performed smoothly.

It should be noted that the operation changeover switch 43 constituting the selection device may be configured to be switched by remote control by transmission from the transmitter 30. Also, the transmitter 3
Information about which operation system of the Bessel system or the work link system is to be selected from 0 is transmitted, and the information is stored on the receiving side, and the received signal of only the selected operation system is used based on the stored content. Alternatively, the configuration may be such that the reception signal of the other operation system is ignored.

FIGS. 5 to 7 show another embodiment of the present invention.
FIG. 5 is a control block diagram, FIG. 6 is a functional block diagram realized by a program of the arithmetic unit 32, and FIG. 7 is a flowchart of the operation of FIG. As shown in FIG. 5, in this example,
In order to detect whether or not the actuator of the vessel system or the work link system is operating, for example, pressure sensors 45a to 45f for detecting the pressures of the pilot circuits on the output side of the pilot valves 37a to 37f are provided.

In FIG. 6, the operation signal identifying means 60 is
The digital reception signal transmitted from the receiver 31 is identified, and the content of the received signal is determined by the operation signal of which actuator.

As shown in steps S1 to S4 in FIG. 7, the vessel operation signal control means 61 is activated when the received signal is a vessel-based operation signal, and the pressure sensor 45c to 45f of the working link system actuator is activated. Referring to the output, when one or more of the work link operation detecting means including the pressure sensors 45c to 45f detects the operation of the work link, the vessel operation command means 35a and 35b are not operated, and the pressure sensors 45c to 45f are not operated. When none of the work link operation detecting means 45f is operated, the cylinder 13 and / or 20 of the vessel 4 is operated.

On the other hand, the work link operation signal control means 62
Is activated when the received signal is an operation signal for the working link system, as shown in steps S1, S2, S5 to S7 in FIG.
5a, 45b, and pressure sensors 45a, 45b.
When at least any one of the pressure sensors 45a and 45b detects that the vessel is in operation, the operation link operation instructing means 35c to 35f is not operated, and only when none of the pressure sensors 45a and 45b is operated, the operation link 6 is operated. Activate

As described above, when one of the actuators of the vessel system and the work link system is in operation, the other actuator cannot be operated, so that the interference between the work link 6 and the vessel 4 is prevented. Prevent,
Smooth work can be performed.

As means for detecting that the vessel or the work link is operating, the output signals of the vessel operation command means 35a and 35b, the output signals of the work link operation command means 35c to 35f, etc. The internal signal may be detected, and the valve driver 35
a-35f output signals and control valves 39a-39
The secondary hydraulic pressure of f may be detected.

8 to 10 show another embodiment of the present invention. FIG. 8 is a control block diagram, FIG. 9 is a functional block diagram realized by a program of the arithmetic unit 32, and FIG.
3 is a flowchart of the operation of FIG. As shown in FIGS. 8 and 9, in this example, a priority setting means 48 for prioritizing the operation of the Bessel or work link system actuator is provided by a switch or a keyboard, and the actuator is operated with reference to the priority. It is like that.

That is, the vessel operation signal control means 61
Are activated when the received signal is a Bessel operation signal, as shown in steps S1 to S6 of FIG. 10, and the pressure sensors 45c to 45c of the working link system actuator are activated.
Reference is made to the output of f and priority setting means for giving priority to the vessel operation even when one or more of the operation link operation detection means comprising the pressure sensors 45c to 45f detects the operation of the operation link. If it is set at 48, the work link 6 is stopped and the vessel is operated. When the work link 6 is not operating, the work link 6
Is activated, the vessel 4 is operated.

On the other hand, the work link operation signal control means 62
Is activated when the received signal is the operation signal of the working link system as shown in steps S1, S2, S7 to S11 of FIG. 10, and refers to the outputs of the pressure sensors 45a and 45b of the Bessel actuator, Pressure sensor 45a,
Even if one or more of the vessel operation detecting means 45b detects the operation of the vessel, if the priority setting means 48 sets the work link operation to be prioritized, the vessel 4 is not operated. The operation link 6 is stopped and the work link 6 is operated. When vessel 4 is not operating,
Even if the operation of the vessel 4 has priority, the work link 6 is operated.

As described above, by giving priority to either the vessel 4 or the work link 6, simultaneous operation of the two can be eliminated, mutual interference can be prevented, and smooth work can be performed. In addition, by giving priority to particularly urgent work, work can be performed in a form of work suitable for the work site.

FIG. 11 shows a configuration in which a driver's seat 63 having an operation lever 62 is installed on the turning device 5 of the work link 6 so that a work machine can be operated by manual operation.
3, an operation changeover switch 43 is provided, and only one of the vessel 4 and the work link 6 is selectively operated by operating the switch 43. As shown in the embodiment of FIGS. 5 to 7 or the embodiment of FIGS. 8 to 10, even in such a manually operated type, while one of the vessel system and the work link system is in operation, the other is operated. Or a configuration in which the operation is determined according to the priority order. Even in such manual operation, even if the operation levers of the vessel 4 and the work link 6 are simultaneously operated, only one of the operation levers 62 is operated, and mutual interference is prevented.

In the present invention, a work link including a telescopic arm or a work link using an extension arm can be used. Further, the working machine of the above embodiment can serve three functions of a hydraulic excavator, a loading machine (wheel loader), and a crawler carrier (carrier) in the development of the residential land, but furthermore, the working machine frame discharges the soil. If a plate is attached, it can also serve as a bulldozer (spreader), and one unit can fulfill four roles.

In addition to the backhoe bucket 23 at the end of the work link 6, if a work tool for holding a retaining pile, a work tool for crushing concrete, a work tool for compaction, etc. are prepared so that they can be replaced or added, In water and sewage works, transportation of materials and equipment, crushing of concrete or asphalt after cutting, dump loading, excavation, installation of earth retaining equipment, compaction, and backfilling can be performed by one unit.

Further, if the work link 6 is provided with a nail-type or pinch-type dismantling work tool used for dismantling a wooden house or a reinforced concrete crushing work tool, the dismantling machine or the crushing machine and the transport vehicle can be mounted. Two units can be fulfilled by one unit. Also, dismantled and crushed materials are stored in vessel 4,
Because you can work while cleaning up, the working environment is good,
Safety is improved.

When the backhoe bucket 23 or the like is used for the work link 6, the work machine can be used as an excavator and a transporter for small trees in the horticultural industry.
In addition, as a measure against earthquakes, when excavating, carrying out, excavating to the foundation, and carrying out excavated earth and sand for pier reinforcement to reinforce the pier, apply a work machine to each pier, and use one or two dump trucks as a whole. By preparing and performing the work, the work can be performed efficiently.

As the work implement attached to the work link 6, besides the above, a loader bucket, breaker, clamshell, hawk or agricultural or horticultural work implement can be used.

[0050]

According to the first aspect of the present invention, there is provided a selection device for selectively permitting either one of the operation of the vessel system and the operation link system. Are operated at the same time, only one of them is allowed to operate, and both are not operated at the same time. Therefore, mutual interference due to simultaneous operation can be prevented, and a smooth operation can be performed.

According to the second aspect, when one of the vessel system and the work link system is in operation, even if the other operation signal is applied, both are not operated at the same time. System and work link system, if both are operated at the same time, both will not work at the same time,
Mutual interference due to simultaneous operation can be prevented, and smooth work can be performed.

According to the third aspect, one of the Vessel system and the work link system is prioritized, and when the operation signal of the higher priority is applied, the operation of the other is stopped and the actuator of the higher system is used. Even if both operation means of the vessel system and the work link system are operated at the same time due to erroneous operation, both are not operated at the same time, and mutual interference due to simultaneous operation of both can be prevented, and Work can be performed. In addition, by giving priority to work with high urgency, work can be performed in a form of work suitable for the work site.

[Brief description of the drawings]

FIG. 1 is a side view showing an embodiment of a working machine according to the present invention with a vessel lifted.

FIG. 2 is a plan view showing the working machine of the embodiment with work links omitted.

FIG. 3 is a front view showing the working machine of the embodiment with work links omitted.

FIG. 4 is a control block diagram of the working machine of the embodiment.

FIG. 5 is a control block diagram of a working machine according to another embodiment of the present invention.

FIG. 6 is a functional block diagram of the embodiment of FIG. 5;

FIG. 7 is a flowchart for explaining the operation of the embodiment of FIGS. 5 and 6;

FIG. 8 is a control block diagram of a working machine according to another embodiment of the present invention.

FIG. 9 is a functional block diagram of the embodiment of FIG. 8;

FIG. 10 is a flowchart illustrating the operation of the embodiment of FIGS. 8 and 9;

FIG. 11 is a side view showing another embodiment of the working machine of the present invention.

FIG. 12 is a plan view showing a conventional working machine.

[Explanation of symbols]

1: running body, 2: turning device, 3: turning frame, 4: vessel, 5: turning device, 5a: turning motor, 6: work link, 7: power unit, 8: lift device, 9: dump device, 13: Hydraulic cylinder for lift, 20: hydraulic cylinder for dump, 23: backhoe bucket, 25: boom cylinder, 26: arm cylinder, 27: bucket cylinder, 30: transmitter, 31: receiver, 32: arithmetic unit, 34a to 34f : Operation command means, 35a to 35f:
Valve driver, 37a to 37f: pilot valve, 3
9a to 39f: control valve, 43: operation changeover switch, 44: relay, 45a to 45f: pressure sensor (operation detecting means), 46: pilot hydraulic pressure source, 47: main hydraulic pressure source, 63: driver's seat

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Fumiki Nakagiri 2-6-1, Otemachi, Chiyoda-ku, Tokyo Inside the Hitachi Construction Machinery Co., Ltd. (72) Inventor Akinao Komori 2-6-Otemachi, Chiyoda-ku, Tokyo No. 2 Sun Construction Machinery Co., Ltd. (72) Inventor Kazufumi Hashiguchi 2-6-1 Otemachi, Chiyoda-ku, Tokyo Sun Construction Machinery Co., Ltd.

Claims (3)

[Claims] 1. A frame is installed on a traveling body, a dump type vessel is mounted on the frame, and a work link is mounted on the frame via a turning device, and a work tool is mounted on the work link. A work machine, comprising: a selection device that selectively allows operation of only one of the work link and the vessel. 2. A frame is set on a traveling body, a dump-type vessel is mounted on the frame, and an articulated work link is mounted on the frame via a turning device, and work is performed on the work link. A work implement, wherein a device is provided for inhibiting operation of one of the work link and the vessel while the other is in operation. 3. A frame is installed on a traveling body, a dump type vessel is mounted on the frame, and a work link is mounted on the frame via a turning device, and a work tool is mounted on the work link. A work machine, comprising: a device that attaches and prioritizes the operation of one of the work link and the vessel and stops the operation of the other.